The median/average age of the population of Port Lincoln is 38 years of age.

86.7% of people living in the region of Port Lincoln were born in Australia. The other top responses for country of birth were 3.5% United Kingdom, Channel Islands and Isle of Man, 0.8% New Zealand, 0.6% Germany, 0.5% Philippines, 0.5% Croatia, 0.4% Netherlands, 0.3% South Africa, 0.3% Italy, 0.2% United States of America.

92.3% of people living in Port Lincoln speak English only. The other top languages spoken are 4.5% Language spoken at home not stated, 0.6% Croatian, 0.5% Other, 0.4% Italian, 0.2% German, 0.2% Greek, 0.2% Tagalog, 0.1% Filipino , 0.1% Australian Indigenous Languages .

46.7% of people are married, 34.4% have never married and 9.0% are divorced and 3.3% are separated. There are 795 widowed people living in Port Lincoln.

54.2% of the people living in Port Lincoln over the age of 15 and who identify as being in the labour force are employed full time, 33.1% are working on a part time basis. Port Lincoln has an unemployment rate of 5.3%.